2010A&A...515A..18W


Query : 2010A&A...515A..18W

2010A&A...515A..18W - Astronomy and Astrophysics, volume 515, A18-18 (2010/6-1)

Modelling the variability of 1ES 1218+30.4.

WEIDINGER M. and SPANIER F.

Abstract (from CDS):

The blazar 1ES 1218+30.4 has been previously detected by the VERITAS and MAGIC telescopes in the very high energies. The new detection of VERITAS from December 2008 to April 2009 proves that 1ES 1218+30.4 is not static, but shows short-time variability. We show that the time variability may be explained in the context of a self-consistent synchrotron-self Compton model, while the long time observation do not necessarily require a time-resolved treatment.The kinetic equations for electrons and photons in a plasma blob are solved numerically including Fermi acceleration for electrons as well as synchrotron radiation and Compton scattering.The light curve observed by VERITAS can be reproduced in our model by assuming a changing level of electron injection compared to the constant state of 1ES 1218+30.4. The multiwavelength behaviour during an outburst becomes comprehensible by the model.The long time measurements of VERITAS are still explainable via a constant emission in the SSC context, but the short outbursts each require a time-resolved treatment.

Abstract Copyright:

Journal keyword(s): galaxies: jets - relativistic processes - radiation mechanisms: non-thermal - Lacertae objects: individual: 1ES 1218+30.4 - galaxies: active BL

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 QSO B1218+304 BLL 12 21 21.9426947832 +30 10 37.158534012   16.50 15.85 15.7   ~ 434 1

Query : 2010A&A...515A..18W

Basic data :
QSO B1218+304 -- BL Lac
Origin of the objects types :

(Ref) Object type as listed in the reference "Ref"
(acronym) Object type linked to the acronym according to the original reference
() Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases

Other object types:
X (2009A&A,2A,...), BLL (2010ApJ,SHBL,...), Rad (B2,BWE,...), gam (1FGL,2FGL,...), Bla (2013ApJS,[DGT2001],...), Bz? (2019A&A,3HSP,...), G (2014ApJ,LEDA,...), IR (2MASS,WISEA,...), QSO (QSO,[HB93]), blu (CSO,[RS65]), AGN (2011ApJ), Q? (FBQS), GiC (CAIRNS), * (Gaia), UV (PG)
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
ICRS coord. (ep=J2000) :
12 21 21.9426947832 +30 10 37.158534012 (Optical) [ 0.0491 0.0471 90 ] A 2020yCat.1350....0G
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
FK4 coord. (ep=B1950 eq=1950) :
12 18 51.6102405911 +30 27 15.351465007 [ 0.0491 0.0471 90 ]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
Gal coord. (ep=J2000) :
186.3585663694743 +82.7345486235420 [ 0.0491 0.0471 90 ]
Syntax of proper motions is : "pm-ra pm-dec [error ellipse] quality bibcode"
  • pm-ra : mu-ra*cos(dec) (expressed in the ICRS system in mas/yr)
  • pm-dec : mu-dec (expressed in the ICRS system in mas/yr)
  • [error ellipse] : error major axis and minor axis (in mas), orientation angle (in deg)
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the proper motion reference
Proper motions mas/yr :
-0.021 0.142 [0.065 0.063 90] A 2020yCat.1350....0G
Syntax of radial velocity (or/and redshift) is : "value [error] (wavelength) quality bibcode"
  • value : radial velocity or/and redshift (Heliocentric frame) according to your Output Options
    (redshift may be not displayed if the data value is <0 and the database inside value is a radial velocity)
  • [error] : error of the corresponding value displayed before
  • (wavelength) : wavelength range of the measurement : Rad, mm, IR, Opt, UV, Xray, Gam or  '∼'(unknown)
  • quality : flag of quality ( A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the value's origin
Radial velocity / Redshift / cz :
V(km/s) 50060 [30] / z(spectroscopic) 0.18360 [0.00010] / cz 55041.9 [30.0]
   (Opt) C 2012ApJS..203...21A
Syntax of angular size is : "maj-axis min-axis angle (wtype) quality bibcode"
  • maj-axis : major axis size (arc minutes)
  • min-axis : minor axis size (arc minutes)
  • angle : orientation angle (in degrees)
  • (wtype) : wavelength class for the origin of the angular size (Rad, mm, IR, Opt, UV, Xray, Gam)
  • quality : flag of quality of the angular size values ( A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the angular size reference
Angular size (arcmin):
0.170 0.119 90 (NIR) C 2006AJ....131.1163S
Syntax of fluxes (or magnitudes) is : "filter-name (System) flux-value [error] quality MultVarFlags bibcode"
  • filter-name : U, B, V, R, I, G, J, H, K, u, g, r, i, z
  • (System) : may be AB (default is Vega)
  • flux-value : value of flux or magnitude
  • [error] : error value
  • quality : flag of quality of the flux value ( A=best quality -> E=worst quality, {� } =unknown quality)
  • MultVarFlags : Mult is zero or one char (J) for joined photometry ; Var can be zero or two chars (V[0-4])
  • bibcode : bibcode of the flux reference
Fluxes (12) :
B 16.50 [~] D 2010A&A...518A..10V
V 15.85 [~] D 2010A&A...518A..10V
R 15.7 [~] E 2009A&A...495..691M
G 16.684721 [0.011153] C 2020yCat.1350....0G
J 14.547 [0.112] D 2006AJ....131.1163S
H 13.609 [0.121] D 2006AJ....131.1163S
K 13.246 [0.137] D 2006AJ....131.1163S
u (AB) 16.389 [0.007] B 2009ApJS..182..543A
g (AB) 16.097 [0.003] B 2009ApJS..182..543A
r (AB) 15.804 [0.004] B 2009ApJS..182..543A
i (AB) 15.621 [0.004] B 2009ApJS..182..543A
z (AB) 15.462 [0.006] B 2009ApJS..182..543A
SIMBAD within arcmin
', {sourceSize:12, color:'#30a090'})); aladin.on('objectClicked', function(object) { var objName=object.data.MAIN_ID; aladin.showPopup(object.ra,object.dec,'',''+ objName+''); });" title="Show Simbad objects"> Overlay Simbad points in this preview
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within arcsec The VizieR photometry tool allows for easy visualization of photometry points extracted around the Simbad position from photometry-enabled catalogues in VizieR.
The search radius has to be specified by the user. It is currently limited to a maximum of 30 arcsec. It depends mostly on the precision or quality of the coordinates (SIMBAD and VizieR catalogs), the resolution of the images from which the sources were extracted, source extent, and source crowding.
Suggestions are: crowded field: 0.5 to 1.5 arcsec, 3 arcsec otherwise; uncertain coordinates (SIMBAD quality E or coordinates without reference): 5 to 30 arsec (risky!).
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Some important notes on this object about identifications and objects associations.
notes:


The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (73) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

QSO B1218+304 3FHL J1221.3+3010 RBS 1100 9Y-MST J1221+3010
2A 1218+304 FIRST J122121.9+301037 1REX J122121+3010.6 [ATZ98] D113
2A 1219+305 GB6 J1221+3010 RGB J1221+301 [DGT2001] B1218+304
3A 1218+303 GB6 B1218+3027 RX J1221.4+3010 [HB93] 1218+304
B2 1218+30 87GB 121852.6+302715 RX J1221.3+3010 [IN88] 1218+304
B2.1 1218+30 1H 1219+301 1RXS J122121.7+301041 [MGL2009] BZB J1221+3010
BWE 1218+3027 H 1219+305 SDSS J122121.94+301037.2 [MML2015] 5BZB J1221+3010
CAIRNS J122121.94+301037.1 H 1218+304 SHBL J122121.9+301037 [RS65] 4
CLASS J122121.9466+301037.152 3HSP J122122.0+301037 SWIFT J1221.3+3012 [VV2000b] J122121.9+301037
CSO 133 IERS B1218+304 TeV J1221+301 [VV2003b] J122121.9+301037
1ES 1218+30.4 INTREF 488 TIC 357187187 [VV2006b] J122121.9+301037
EXO 1218.8+3027 IVS B1218+304 VER J1221+301 [VV2010b] J122121.9+301037
FBQS J1221+3010 LAMOST J122121.94+301037.2 2WHSP J122121.9+301036 [VV98b] J122121.9+301037
1FGL J1221.3+3008 LEDA 1893319 WISEA J122121.94+301037.1 [ZEH2003] RX J1221.3+3010 1
2FGL J1221.3+3010 2MASS J12212194+3010370 WISE J122121.95+301037.2 Gaia DR3 4013476071428318720
3FGL J1221.3+3010 2MASX J12212192+3010368 WISE J122121.94+301037.1 Gaia DR2 4013476071428318720
4FGL J1221.3+3010 NVSS J122121+301036 WN B1218.8+3027
1FHL J1221.3+3011 PBC J1221.3+3008 2XMM J122121.9+301036
2FHL J1221.3+3009 PG 1218+304 XMMSL1 J122121.9+301040

References (434 between 1850 and 2023) (Total 434)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements


velocities : 8    PM : 2   

   

Observing logs


IUE : 1    XMM : 1   

   


External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : QSO B1218+304

Link by name to the catalogue in VizieR :

BWE 1218+3027 FIRST J122121.9+301037 IERS B1218+304 2MASS J12212194+3010370 2MASX J12212192+3010368
NVSS J122121+301036 PG 1218+304 1RXS J122121.7+301041 SDSS J122121.94+301037.2 WISEA J122121.94+301037.1
WISE J122121.95+301037.2 WISE J122121.94+301037.1 WN B1218.8+3027 Gaia DR3 4013476071428318720 Gaia DR2 4013476071428318720

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2022.11.28-11:59:49

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